https://bugs.kde.org/show_bug.cgi?id=504900
--- Comment #7 from Adam Fontenot <adam.m.fontenot+...@gmail.com> --- Additional suggestion for others who'd like to reproduce this: 1. Maximize three windows of the same application on the same virtual desktop, with no other windows open on that desktop. 2. Alternate between hovering the thumbnail previews for the windows in the icons-only task manager with your cursor. If you ever see a brief flash of your desktop wallpaper or an inactive window which is not one of the two you switched between, you're seeing some version of this issue, because the effect has been tricked into briefly showing the wrong thing before painting the right thing over it. I see both of these very frequently, even when flickering doesn't result. I think this is probably easier to reproduce. Actually, I'm even able to reproduce this part of the issue with *other* ways of switching between window previews, including hovering the preview cards for separate windows in the "Icons and Text" task manager and even alt-tabbing between windows! I see a brief flash of either the desktop or an unrelated window after the setup instructions above. I've never gotten strobing with one of these methods though, so it never occurred to me to report it. Can others confirm? This is probably downstream of a more general KWin bug. I'm not sure what causes the effect to sometimes strobe between the right and wrong previews, but figuring out why it *ever* shows the wrong thing and fixing that would probably resolve the issue. -- You are receiving this mail because: You are watching all bug changes.